/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraParameterMapHistory.h
Called in a depth-first traversal to identify a given Niagara Parameter Map pin that was touched during traversal.
int32 RegisterParameterMapPin ( const [FPin](API\Plugins\NiagaraEditor\TNiagaraParameterMapHistory\FPin) * Pin )